* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

html,
body,
#app {
    width: 100%;
    height: 100%;
    background-color: #f5f5f5;
}

li {
    list-style: none;
}

a {
    text-decoration: none;
    color: #000;
}

textarea {
    resize: none;
}